Portable tool with swivel head



Jam., .EL H95@ M TRAPET PORTABLE TOOL WITH SWIVEL HEAD Filed 001;. 23,1944 Patented Jan. 31', 1950L UNITED STATES PATENT OFFICE 2,496,027PRTBLE '"r'. Wri SWIVEL HEAD Maurice Traiiet, Los Angeles, Calif.Abisieatio neither 23, 1944, serial No. 559,959

This invention relates te impioverheiits iii portable too-ls, and hasfor its principal object the provision of a basic hand tool structuredexs tremeiy simple design Matted tn contioi the now of air, gas, iluids,ooinpoiiiids, 'or the likevvliile unf der pressure, frin a s'ourcebisupply to wand through the operating head er the device, `which may beadapted for use as an air bloiver, a rotor, a vibrating tool, adispensing nozzle, or any other purpose to which the principles involvedmay be applicable.

A further importantobiect of the' invention is to supply a device f trieabove character having a dispensing or operating head which canm beswung at an angle to tli'e" long`itudina1 aiiis ofits handle portionwithout loosening or d taniiig any of the parts or otherwisenecessitating sube stantial time-consuming effort, so that the Work'-ving portion thereof inay lie' directed at locations heretoforeconsidered inaccessibleto devices' f the saine general character,resulting in greater convenience; substantial Saving' of;v operatingtime, and niore" satisfactory and eicint per= orrnaice in eiiecd rigvvok operations, also considerably eipe'd'itirig' production in siiclise's as involve manufacturing or" construction.

A. stili further ebjetgof trie iii-vennen is tu previdepeitabieiiitieien foci adaptable g eiefenjts such as air,

for dispensing or onli gases, iiu'ids, compounds; i the' like Linderpressure, as,` for eiiainplfe', use f sfuc'h criiir'ssed elements for:lema-ting filtrati f or' irritating mechanisms contai `ed` in the to'lsWorking p'oL non or head, in which the' working or exhaust portion isConveniently! ihvable at to its' base for the narcose f reaching"coude-aiesor out-of-the-Wa'y placs, f foi" multiple operations"heretofore iediiigf the lise'- o'f tufo" or n separate toolsy or @para eworking Heads inter# changeable iii oilectiii with a ciiinoi handle orbase.

Another and stili furthersbjt of the iii-l vention is` to provide;`a-iii-iefiiiiatic di hydiiilic type of portable tool Having# ai pivotingdisps' or working headirideiiei for locating cert operating positions;yan impivedi and e'iltre ely simple and novel valve'l meolianisin' whicheffec'-A tively controls the flow df the actuating elen'erit thereof,and at the Sametime automatically locks the toolsindexing mechanisminany given vvr-li-I ing position While an'A actuating elenient isflowing through the device, whereby ay rigidy-onesl-ii-fti-ngi.non-rattling relationship is' inaint'aineda between the niajorcomponentv parts" of the clevi`c'e,A thus guardia-g against; damage tothe tool and possible circular socket or 2 injury to the" operator, andrendering the device fooleproof.

Other and further objects of the invention will be apparent from thedisclosure in the accom pani/ing drawing and following' specication.

The invention, in a preferred form, is illustrated in the drawing andhereinafter more fully described.

In the drawing:

Figure 1 is a central longitudinal section through an aire-hammerembodying the invention, showing its pivotally inounted head in one ofseveral possible operating positions, and indicat` ing another of itsoperating positions in broken lines.

Figure 2 is a sectional View through the operat-` ing head of thedevice, taken on the line 242 of Fig. 1.

Figiie 3` is" a transverse sectional view through the main body orhandle portion of the device, tali'enalong the line 3`3 of Fig. 1.

Figure l is another transverse sectional view through the main body orhandle portion of the device, taken on the line 4 4 of Fig. 1.

Figure 5 is still another transverse sectional view through the handleportion of the device, taken along the line #"5 of Fig. 1.

As shown in the drawing.

The elongated main body portion of the tool is in the general shape of ahandle il) provided at its forwardend with an integral extension ilfrefe'rablyV inch-ning 45 degrees, which eXtension is transverselyboredV through at right angles to its" own longitudinal plane to form acone-shaped bearing l2 tapering uniformly downward and ending in areduced lower orii'ce i3.

An operating head M is removably and rotatably' mounted? at the Workingend of the handle Hll by means' of theihads integral rounded taper!ing'` shank |53 which is of a shape correspond-lng to" the innercontour' of the socket I2 and is tted therein so" as to render the headi4 freely rot-fao able; A reduced circular concentric projection oi bossi6" integral with the shank i5 is exposed exteriorly of the orifice i3and is iitted with a retaining ring or siniilar stop element i7 con-lnected to the" boss t6' by means of" a` laterally disposed pin i8extending through both the elements i6 and Vl, thus securing the head Mto the base ill".Y An element lil to" provide the desired' tensioni.

rotatable suitable form of Contact element or discharge expansionWasherf or similar spring-like i9 iS interposed between the l'ts i l MLadapted to carry mechanism, such as, for example, the compressed airactuated hammer assembly illustrated in Fig. 1, which comprises apiston-like hammer element 2i) operably mounted for longitudinallyslidable movement within its cylindrical housing 2 l, which ispreferably set obliquely into the head it by threadable insertion into acorrespondingly directed bore 22 having a relatively wide centrallydisposed annular air-chamber 23 the surrounding sidewall of which isspaced away from the element 2| so as to form an air-jacket about thelatter.

A reduced annular concentric depression or socket 24 at the bottom ofsaid bore is adapted to form a seat for the lower end of the tubularelement 2i for the purpose of its rigid alignment and also to form anair-tight seal or cap for the cylinders lower end at this point.

The piston 29 is preferably of the shape best illustrated in Figures 1and 2, wherein its narrow work-contacting end is adapted to snuglyextend in slidable relationship through the relatively narrow exteriororifice 25 formed centrally of the cylinders exposed portion 26.

The interior of the cylinder 2l is formed with a narrow upper chamber orbore 21, the annular sidewall of which is peripherally drilled at apoint exteriorly of the head i4 to provide laterally di rected exhaustof discharge ports 28 leading from the interior of the cylinder' 2E tothe outer atmosphere through an annular tapering deflecting vent 9formed by a suitably flanged ring 33 threadably mounted upon theoutwardly projecting portion 2t of the cylinder at a point between thelateral discharge ports 28 and the head i4, for the purpose of directingany air or the like expelled from the device in the desired direction sothat the expelled element may be utilized for blowing away dust, dirt,chips, or the like which may accumulate during a working operation, orfor other practical purposes.

The lower bore 3l of the cylinders interior is substantially wider thanthe upper bore 21, and its sidewall area is also peripherally drilledadjacent its upper terminus to provide laterally directed entry ports 32leading from the annular air passage 23 to the interior of the cylinder2l for the introduction of compressed air or other actuating elementsadapted to flow through the cylinder and its contained piston 2) so asto cause the desired vibrating motion of the latter as hereinafterdescribed.

The body of the piston 2? is preferably formed with a series of suitablyspaced relatively wide annular cylinder-contacting surfaces 33, 3d, 35,and an intermediate neck portion 35 of substantially reduced diameterwhich is laterally drilled to provide air passages 31 leading from thesurrounding annular chamber-like area within the cylinder 2i, to alongitudinally disposed central bore 38 communicating with the interiorof the cylinder at a point directly below or behind the piston 25, wherean air chamber 3S is formed whenever the piston 2D is in suspendedposition.

The handle lil is accordingly adapted for conducting compressed air orsome other pressure element from a source of supply to the interior ofthe operating head i4, and is therefore provided with a hose connectionor the like El attachable to a supply nozzle (not shown). A series ofcom municating passages 4i, 42, 43, 44, 45, 45, 41, .18 forni acontinuous conducting line through the interior of the handle H) andthrough certain of the handles contained parts, such line extending fromthe open connection 40 to the forward feeder channel 49.

The feeder channel 49 is adapted to feed the compressed air or otherpressure element into the operating head lil while the latter is in anypredetermined operating position, such as either of the two positionsindicated in Figure 1. For this purpose a two-way connecting passage 50is laterally drilled through the heads shank I5, one of the oppositelydisposed end openings of which passage comes into registration with theair feed channel t9 whenever the head I4 is turned to one of the saidoperating positions A centrally disposed longitudinally directed airpassage 5I leads from the twoeway air passage 50 into the annular jacket23. It will be apparent that while one orifice of the lateral passage 50is in communication with the feeder channel 49 its opposite orice willbe blocked by the adjacent inner surface of the socket i2, as best shownin Fig. 1.

The twin parallel channels 45, 41 of the aforesaid air-circulatingsystem are pos-itioned within the oppositely disposed side portions of aremovable insert or guide element 52, the forward end 53 of which isprovided with a transverse slot 54 in which a trigger-.cam 55 issuitably positioned so as to be rotatable upon a pin 56. Air-tightconnections between certain of the removable elements within the handlel0 are assured by the interpositioning of suitably shaped gaskets or thelike 51, 58.

The iiow control mechanism contained within the handle it! preferablyincludes a manually operated ball-shaped check valve 59 centrallydisposed within the passage 43 and normally held in closed positionagainst the annular seat 6i] by a small coil spring 6|, the seat 60being spaced away from the adjacent elements 52, 5S so as to form theair-deflecting passage 45 leading from the passage 44 to the twinparallel channels 4B, d1, from which channels the air is directed intothe feed channel 49 via the V-shaped passage 48, which is bestillustrated in Figures 1 and 4.

The elongated guide element 52 is removably positioned forward of theconnection 4U and is prevented from rotating within the handle IU by avertically disposed pin or plug 52 co-operating with the adjacent slot63 of the member 52. The guide element 52 has a central longitudinalbore E4 within which is slidably positioned a plunger or the like E5adapted to Contact one end of a coil spring 6G abutting a stop element61, the spring 66 being adapted to normally hold the plungers forwardprojecting end 68 in contact with the adjacent trigger-cams arcuate edge69.

The plunger has an integral rearwardly directed longitudinal extensionor stem 1li of reduced diameter extending centrally through the spring65 and stop element 61 as well as through Athe annular guide ring orplug 1l which serves as an air pressure seal to prevent escape of theair or other actuating element flowing through the chamber 45 whilebeing diverted from the incoming passage 44 to the twin parallelchannels 46, 41.

The stem 15 projects rearwardly through the passage 45 and into thevalve seats central orice 44, where its terminus is in close proximityto the seated ball 53 so as to be in position to instantly dislodge thelatter upon slightest rearward movement of the plunger 85.

The bottom of the trigger-cam 55 has an integral downwardly extendingprojection 12 depending into an adjacent handle slot 13, at which pointit engages the upper surface of a button element or similar manualcontrol 14 which is pivoted at 15, partially recessed Within the slot13, and restricted in its outward movement by a rearwardly 5 disposedextension 1.6 adapted to contact a stop shoulder il integral with thebody lll. It will be seen that pressure upon the button 14 will causethe rising arcuate cam edge 69 to bear against the adjacent terminus 6Bof the plunger `(i5 and result in unseating of the ball valve 59.

A snap-in system of indexing is provided for the purpose ofautomatically interrupting rotation of the swivel head i4 at certainpredetermined working positions to bring about a pereotly alignedoperating relationship between the head Hi and the handle It withoutnecessitating any extra examination and adjustment, regardless of theparticular working angle of the heads contained apparatus in relation tothe handle IIJ.

This indexing system consists of a plurality oi spaced notches ordepressions 18, '19, positioned along the periphery of the shank l5,which notches are adapted to be entered or engaged by the tapering end80 of a slidable spring-pressed Y.

pin 8l positioned within a longitudinal bore 82 located in the forwardend of the handle it, the path of travel of said pin 8i being restrictedby means of its longitudinal slot 83 which is movable over and adaptedto co-operate with a stationary laterally disposed stop pin 84.

A coil spring 85 for actuating the longitudinally slidable indexing pin3l is slida'oly positioned between the latter and a second elongated pinelement 36 of similar diameter and similarly slidable within the bore82, the element 5t extending rearwardly and having one end 8l projectinginto the cam-containing compartment or slot 54, the adjacent pivotallymounted trigger-cam 55 having a forwardly directed upper protuberance 88held in constant spring-pressed contact with the pin end 3l by reason ofthe blocking or bracing contact between the button 'ld and the camslower projection l2, while the expansion spring' 85 constantly urges theother pin element 3| forward but nevertheless readily yieldable to anybacl pr'essure created against its projecting forward end Si! as saidpoint rides smoothly and easily out of the notches '13 and I9 when theoperator turns the head l from one indexed position to another, asbetween operating periods.

However, it will be apparent that when the tool is properly indexed andfully operative in either working position and supplied with compressedair or other actuating force for its work contact means, slight pressureagainst the exposed outer edge 89 of the control button 'M will rotatethe trigger-cam 55, and such action will at one and the same time causethe cams arcuate edge 5S to bear against the projecting end 68 of theplunger 55 to instantly open the Valve 59 and will also simultaneouslycause the triggereams forward projection 88 to bear against and throwthe adjacent pin element 3G forward to tightly compress the spring 85against the indexing pin Eil, resulting in temporary locked engagementof the latters tapering point 8D within one of the notches 'I8 or 'i9and thereby maintaining a positive and rigid alignment of the majorparts lll and hl during the entire time the device is in operation,preventing vibration or jarring therebetween which might otherwise causeaccidental rotation of the head lll and consequent damage to the deviceand possible injury to the operator. By centralizing both of theaforesaid movements under the one simple, convenient, and easilymanipulated control element ill, the device attains a safe andfool-proof character, since there is no occasion for the operator tooverlook troublesome preliminary details of a kind` the neglect of which6 under certain conditions might result disastrously to tool oroperator, or both.

It will be obvious that upon introduction of compressed air into thehead i4 by Way of the system of air passages hereinbefore described, arapid vibration of the piston 2t longitudinally of its containingcylinder 2l will ensue as air pressure is alternately built up in theair spaces respectively located anteriorly and posteriorly of thepistons widest terminus S5 by the following process: Assuming thestarting position of the piston 26 to be as illustrated in Fig. 1 whenthe valve 59 is opened, compressed air entering the device will coursethrough the continuous system of channels 4i, t2, 43, 4t, 45, i6- 47,48, 491, 5U, 5l, 23, 32 and into the cylinders inner annular spacesurrounding the pistons enlargement 34, where inward or reverse pressureagainst the adjacent shoulder of the pistons enlargement 35 will forcethe piston to recoil until the enlargee ment 311i is no longer incontact with the upper cylinder wall. This brings the air spacesurrounding the pistons neck 35 into communication with the inrushingair below the cylinders dividing shoulder 9b, breaking the reversepressure as the air begins to flow interiorly of the piston by way ofthe pistons ports Si and rushes downward through the longitudinalcentral bore 38 toward and into the posterior pressure chamber 39, thusbuilding up pressure behind the pistons enlargement 35 to force thepiston outward. During' the pistons outward stroke its enlargement 3!!again ree-establishes contact with the upper cylinder wall, blocking theow of air inwardly through i the lateral ports 3l, and the neck 36reaches the planev of the discharge openings 28, breaking the pressurebehind the piston 20 as compressed air is discharged into thesurrounding atmosphere through the vent 29, whereupon repetition of thecycle is begun by rearward pressure of the inrushing air extericrly ofthe piston as hereinbeiore described.

When an opera-tion has been concluded, the operator simply withdrawspressure from the control button is, causing the tools variouscontainedsprings to` exert the required back pressure to close the intake valve59 and render the index ing pin S i yieldable, thus instantly andautomatically releasing the head Hl for rotation, interchange oi toolelements, or other safe and convenient manipulation.

Ii' the head i4 is provided with additional spaced notches similar tothe notches 37 and 38 at any desired points intermediate of the latter,the working headl may be indexed in a number of other angular workingpositions within the range hereinabove described. Furthermore, the angleat which the tool or other contact element is set in the rotatable headit' could be modified so as to arrange for presentation of the workingtool at different angles thanV the range. herein illustrated, whichshowing includes only the two positions most generally used inoperations of the character herein discussed.

ft will also be understood that the device herein illustrated is merelya representative examplar for a large variety of pneumatic, hydraulic,and other forms oi device in which the same principles could he readilyemployed, and it will furthermore he evident. that `certain ofr thenovel features of the present disclosure could be deleted withoutdetracting in any way from the novel character of the remainingstructure, especially in devices wherein 'the deleted matter would bewholly unnecessary for satisfactory operation of the device for anygiven purpose or by reason of the use of an actuating force other thanthat herein disclosed. For example, where electric current is the meansof operating the device, the novel valve and channel means need not beincorporated, yet the novel combination including the locking means forthe indexing system would still be present and equally advantageous, andthe single manually operated control button could be used for making andbreaking an electric circuit with but a very slight and perfectlyobvious modiiication of the handle portion of the device to substitutefor the valve-control mechanism of the present showing. It will be justas evident that the pivot means for mounting the swivel head of thedevice could be a ball-and-socket joint or other acceptable expedient insubstitution for the novel joint herein illustrated, the dual-purposesingle control system being usable with practically any form of swiveljoint employed in mounting h the rotatable operating head.

. I claim as my invention:

1. In a portable hand tool, the combination of an elongated base, an airchannel traversing the interior of the base, an intake for said airchannel, aswivel head connected to one end of the base, a pneumatic toolactuating mechanism positioned in said head, said mechanism including anair exhaust oriiice, deflector means surrounding said orice fordirecting iiow oi the exhaust air on a course in the direction of theworking movement of said actuating mechanism, and channel means in saidhead communicating with said actuating mechanism and with the airchannel located in the base.

2. In a portable hand tool, the combination of an elongated base, an airchannel traversing the interior of the base, an intake for said airchannel, a swivel head connected to one end of the base,

' a pneumatic tool actuating mechanism positioned in said head, channelmeans in said head communicating with said actuating mechanism and withthe air channel located in the base, an indexing mechanism forinterrupting rotation of the head at predetermined working positions,Valve means in the base for controlling the ow of air through said airchannels, means for locking said indexing mechanism in indexed positionwhile the valve remains in open position, and a single unitary controlelement for manually actuating both the valve and the said locking meanssimultaneously, and for simultaneously closing the valve and unlockingthe indexing mechanism.

3. In a portable hand tool, the combination of an elongated handlehaving an inclined integral rigid forward extension, an air channeltraversing the interior of the handle, an intake for said air channel, aswivel head connected to said extension and rotatable on an axis atright angles to the longitudinal plane of said extension, a pneumatictool actuating mechanism obliquely positioned in said head, channelmeans in said head communicating with the tool actuating mechanism andwith the air channel located in the handle, and an indexing mechanismbetween the handle and the head for interrupting rotation of the head inany predetermined working position.

4. In a portable hand tool, the combination of an elongated handlehaving an inclined integral rigid iorward extension, an air channeltraversing the interior of the handle, an intake for said air channel, ahead connected to said extension and rotatable on an axis at rightangles to the longitudinal plane of said extension, a pneumatic toolactuating mechanism obliquely positioned in said head, channel means insaid head communicating with the tool actuating mechanism and with theair channel located in the handle, and an indexing mechanism between thehandle and the head for interrupting rotation of the head in anypredetermined working position and securely maintaining a rigid unitaryrelationship between the handle and the head while the tool is operativein said position.

5. In a portable tool assembly, the combination of an elongated handle,a pneumatic tool carrying head rotatably mounted at the Working end ofsaid handle, the mounting of said tool in said head being such thatrotation of said head will direct said tool into a plurality of angularworking positions in respect to said handle, an air supply system forsaid tool, a valve for controlling iiow through said air supply system,and integral means for instantaneously and automatically establishing alocking connection between said handle and said tool carrying head uponopening said valve and automatically maintaining said locking connectionthroughout the period of flow through said valve to prevent rotation ofsaid head while said tool is in operation, said locking means beingadapted for automatic and instantaneous disengagement to free said headfor further rotation upon closing o said air supply valve.

6. In a portable power tool assembly, the combination of an elongatedhandle, a power-driven tool carrying head rotatably mounted at theworking end of said handle, the mounting of said tool in said head beingsuch that rotation of said head will direct said tool into a pluralityof angular working positions in respect to said handle, a power supplysystem ior said tool, means for controlling flow of power through saidsupply system, and integral means for establishing a locking connectionbetween said handle and said tool carrying head to prevent rotation ofthe latter While said tool assembly is in operation, said lockingconnection being automatically set upon starting of power flow to saidtool and being automatically releasable for instant freeing of said headfor further rotatable motion upon cessation of said power ilow.

7. In a portable power tool assembly, the combination of an elongatedhandle, a swivel head connected to one end of the handle, apoweractuated tool positioned in said head, an indexing mechanism forinterrupting rotation of the head at predetermined working positions,means for controlling the power flow to said tool, means for lockingsaid indexing mechanism in indexed position during the flow of power tosaid tool, and a single unitary control element for manually actuatingboth the power flow control means and the said locking meanssimultaneously, and for simultaneously checking the power flow andunlocking the indexing mechanism.

8. In a portable hand tool, the combination of a handle having anintegral rigid forward extension, said extension having an inclinedface, a uid conducting channel carried by the handle, an intake for saidfluid conducting channel, a swivel head connected to said inclined faceand rotatable on an axis at right angles to the plane of said inclinedface, a fluid actuated tool mechanism obliquely positioned in said head,channel means in said head communicating with the tool actuatingmechanism and with the iiuid conducting channel carried by the handle,and an indexing mechanism between the handle and the head forinterrupting rotation of the head in any predetermined working position.

9. A portable hand tool comprising in combination: a handle element, aswivel head rotatably mounted at one end of said handle element, ahuid-actuated mechanism adapted for holding and operating a tool elementxedly connected to and projecting outward from said swivel head, thesaid tool operating mechanism being so positioned on said swivel headthat swiveling of said head will cause the tool held thereby to swingarcuately along a predetermined course in which said tool is capable ofbecoming disposed in a plurality of working positions by projecting invarious angular directions in respect to the longitudinal axis of saidhandle element, indexing means for automatically interrupting rotationoi said head when said tool has reached a desired working position alongsaid course, said handle element carrying a uid conducting channelhaving an inlet orifice adapted to be connected to a pressure fluidsupply and an outlet orifice in juxtaposition with said swivel head andadapted to discharge into said head the fluid conducted through saidchannel, and additional channel means in said head Aadapted forreceiving the fluid discharged from said outlet orifice and conductingsaid iiuid into said tool operating mechanism while said tool isdisposed in any of its predetermined working positions.

10. A portable hand tool comprising in combination: a handle element, aswivel head rotatably mounted at one end of said handle element, aHuid-actuated mechanism adapted for holding and operating a tool elementiixedly connected to and projecting outward from said swivel head, thesaid tool operating mechanism being so positioned on said swivel headthat swiveling of said head will cause the tool held thereby to swingarcuately along a predetermined course in which said tool is capable ofbecoming disposed in a plurality of working positions by projecting invarious angular directions in respect to the longitudinal axis of saidhandle element, indexing means for automatically interrupting rotationof said head when said tool has reached a desired working position alongsaid course, said handle element carrying a iiuid conducting channelhaving an inlet orifice adapted to be connected to a pressure uid supplyand an outlet orifice in juxtaposition with said swivel head and adaptedto discharge into said head the fluid conducted through said channel,and additional channel means in said head adapted for receiving thefluid discharged from said outlet orice and conducting said iiuid intosaid tool operating mechanism while said tool is disposed in any of itspredetermined working positions, said additional channel meanscomprising a centrally disposed fluid channel communicating with saidtool operating mechanism and a plurality of spaced fluid receivingorifices adapted to register with the discharge orifice of the handlesiiuid conducting channel as the head is rotated, said fluid receivingorifices being spaced about the periphery of said head and being incommunication with said centrally disposed uid channel and capable ofleading fluid into said tool mechanism while said mechanism is disposedin any of its various working positions.

11. In a portable hand tool, the combination of a handle having aninclined integral rigid forward extension, a fluid passage traversingthe interior of the handle, said passage having an intake orifice, aswivel head connected to said extension and capable of free movementover a predetermined course, a fluid-actuated tool mechanism iixedlyconnected to said head and adapted to drive a tool element, thepositioning of said tool mechanism on said head being such that movementof said head will direct the said tool element into a plurality oiangular working positions with respect to said handle, a fluid outletorice in said handle extension adapted to discharge fluid passingthrough the aforesaid fluid passage, a fluid passage in said head havinga iiuid receiving orifice adapted to register with and receive fluiddischarged by the handles said outlet oriiice and adapted to supplyoperating fluid under proper pressure to said tool mechanism, and anindexing system formed of co-operating means located the junction ofsaid handle and said head for interrupting movement of the head in anypredetermined Working position by snap-in action automaticallyestablishing and securely maintaining the desired operative angularsetting of said tool in any of said working positions and simultaneouslyresulting in a rigid unitary relationship between the handle and thehead while the tool is operative in any of said positions.

12. In a portable hand tool, the combination of a handle having aninclined integral rigid forward extension, a fluid passage traversingthe interior of the handle, said passage having an intake orifice, aswivel head connected to said extension and capable of free movementover a predetermined course, a fluid-actuated tool driving mechanismiixedly connected to said head and adapted to drive a tool element, theconnection between said mechanism and said head being such that movementof said head will direct the tool element into a plurality of angularworking positions with respect to said handle, a liuid outlet orifice insaid handle extension adapted to discharge fluid under pressure fromsaid handle passage, a fluid passage in said head having a plurality ofspaced fluid receiving orices arranged so as to separately move intoregistration with and receive discharged huid under pressure from thehandles discharge orice and in turn lead said uid to said tool drivingmechanism for the purpose of actuating said tool element while thelatter is disposed at any of its said angular working positions.

MAURICE TRAPET.

REFERENCES CITED The following references are of record in the lle ofthis patent:

UNITED STATES PATENTS Number Name Date 401,003 Burns Apr. 9, 1889'760,329 Funk May 17, 1904 823,059 Leichter June 12, 1906 870,178Johnson Nov. 5, 1907 1,177,713 Leonard Apr. 4, 1916 2,194,062 AlbertsonMar. 19, 1940 2,337,897 Jimerson Dec. 28, 1943 FOREIGN PATENTS NumberCountry Date 214,366 Germany Oct. 13, 1909

